1. Where does the most bending of the light occur in the eyes?
The most bending of the eyes occurs in the light bending parts called the cornea & lens.
2. Describe how the lens works?
The lens is behind the pupil, and it focuses light onto the back of your eyeball. The lens is clear and curved and it can change it's shape depending on what you're trying to focus on.
3.Why do we squint when exposed to bright light?
Because the rods in our eye are really sensitive to light, and it's too bright for our eyes to adjust to at the start and when your pupils are exposed to bright lights they control the amount that goes into your eyes. And if your pupils haven't closed enough and there is way too much light coming in, you start to squint so you are cutting off excess light until your eyes adjust.
eye diagram web
4. Which parts of the eye are involved in focusing?
Pupil - The pupil controls the amount of light coming into your eye from whatever you are focusing on.
Cornea - The cornea helps the eye focus as light makes it's way through.
Iris - The iris has muscles attached to it that change it's shape, this allows the iris to control how much light goes through the pupil.
5. Discuss the implications of losing one eye?
When you lose an eye depending on which side it limits your vision i.e your periferial vision, and it also implies the issue of adjusting to sight loss in one eye does mean re-learning some of the skills we have always taken for granted. You will be less balanced and wou will most likely bump into objects and have difficulty walking up stairs and issues with picking up objects.
Task 2
1. Visual Impairment
Visual Impairment is when many people have some type of visual problem at some point in their lives. Some can no longer see objects far away. Others have problems reading small print in books and newspapers, etc. These types of conditions are often easily treated with eyeglasses or contact lenses, and as I do know many people who wear glasses have visual impairment and they can't see very far away or even close by objects so they wear glasses with special lenses that help that person to see that distance by maginfying everything.
Most of the time visual impairment can be cured but in many cases this isn't the factor i.e blindness.Visual impairment can be cured by glasses, contact lenses, surgery and for blind people we have guide dogs, braille and other special equipment to help these people.
2. Two examples of visual impairment
Macula Degeneration:
Macula Degeneraton is a gradual and progressive deterioration of the macula, the most sensitive region of the retina. The condition leads to progressive loss of central vision (the ability to see fine details directly in front). Macular degeneration is often age related (it occurs in older people, especially older than 60), but sometimes it can occur in younger people.
Glaucoma:
Glaucoma is an increase in pressure inside the eye. The increased pressure impairs vision by damaging the optic nerve. Glaucoma is mostly seen in older adults, although babies may be born with the condition and children and teens can sometimes develop it as well sometimes.
Student Task 4 Penguin Senses Penguins have a flat cornea that allows really clear vision underwater.Penguins can also see into the ultraviolet range of the electromagnetic spectrum.
Can you trust your senses?
1. Where does the most bending of the light occur in the eyes?
The most bending of the eyes occurs in the light bending parts called the cornea & lens.
2. Describe how the lens works?
The lens is behind the pupil, and it focuses light onto the back of your eyeball. The lens is clear and curved and it can change it's shape depending on what you're trying to focus on.
3.Why do we squint when exposed to bright light?
Because the rods in our eye are really sensitive to light, and it's too bright for our eyes to adjust to at the start and when your pupils are exposed to bright lights they control the amount that goes into your eyes. And if your pupils haven't closed enough and there is way too much light coming in, you start to squint so you are cutting off excess light until your eyes adjust.
eye diagram web
4. Which parts of the eye are involved in focusing?
Pupil - The pupil controls the amount of light coming into your eye from whatever you are focusing on.
Cornea - The cornea helps the eye focus as light makes it's way through.
Iris - The iris has muscles attached to it that change it's shape, this allows the iris to control how much light goes through the pupil.
5. Discuss the implications of losing one eye?
When you lose an eye depending on which side it limits your vision i.e your periferial vision, and it also implies the issue of adjusting to sight loss in one eye does mean re-learning some of the skills we have always taken for granted. You will be less balanced and wou will most likely bump into objects and have difficulty walking up stairs and issues with picking up objects.
Task 2
1. Visual Impairment
Visual Impairment is when many people have some type of visual problem at some point in their lives. Some can no longer see objects far away. Others have problems reading small print in books and newspapers, etc. These types of conditions are often easily treated with eyeglasses or contact lenses, and as I do know many people who wear glasses have visual impairment and they can't see very far away or even close by objects so they wear glasses with special lenses that help that person to see that distance by maginfying everything.
Most of the time visual impairment can be cured but in many cases this isn't the factor i.e blindness.Visual impairment can be cured by glasses, contact lenses, surgery and for blind people we have guide dogs, braille and other special equipment to help these people.
2. Two examples of visual impairment
Macula Degeneration:
Macula Degeneraton is a gradual and progressive deterioration of the macula, the most sensitive region of the retina. The condition leads to progressive loss of central vision (the ability to see fine details directly in front). Macular degeneration is often age related (it occurs in older people, especially older than 60), but sometimes it can occur in younger people.
Glaucoma:
Glaucoma is an increase in pressure inside the eye. The increased pressure impairs vision by damaging the optic nerve. Glaucoma is mostly seen in older adults, although babies may be born with the condition and children and teens can sometimes develop it as well sometimes.
Student Task 4Penguin
Senses
Penguins have a flat cornea that allows really clear vision underwater.Penguins can also see into the ultraviolet range of the electromagnetic spectrum.